Watch-case hinge



(Model.)

F. RAPP.

Pif/3,5' Z A l s i I' WATCH CASE HINGE.

Patented Maf. 3, 1885.

- fnl/H722?? v wie wwwa@ UNITED STATES Partnr @tirreno FREDERICK RAPP,OF CHICAGO, ILLINOIS.

WATCH-CASE HINGE.

SPECIFICATION forming part of Letters Patent No. 313,449,61atcd Marel;3, lSS.

Application iiled August 29, 1884.

To fallu/hom t may concern:

Beit known that I, FREDERICK Rari, of Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements inHinge-:Joints for fateli- Cases, and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, in which Figure 1 is aperspective view of watchcase containing my improved hinge. Fig. 2 is alike view ofthe parts of the hinge separated from each other. Fig. 3 isa perspective View of one of the case-center lugs, with its pivotal pinin the position occupied when the cover is connected with saidcase-center, and Figs. 4 and 5 are sections upon a line passing throughthe axes of the pivotal pins, and show, respectively, the positions ofthe latter when engaged with and x disengaged from the case-coverportion of said hinge.

Letters of like name and kind refer to like parts in each of the gures.

My invention relates to a watch-case hinge which is contained entirelywithin the case, and has for its object the ready connection andseparation of the cover and ease-center portions of the same; to whichend said invention consists, principally, in a hinge for watchcases inwhich are employed two pivotal pins that are each caused to engage withthe adjacent lug by an endwise movement, and when thus engaged arelocked in place by a screw or other equivalent means, substantially asand for the purpose hereinafter specilied.

It consists, further, in a hinge for watchcases in' which each outsidelug is provided with an axial opening that contains a pivotal pin whichby an endwise movement may be caused to project beyond. the end of saidlug and to enter into and engage with an axial opening in the adjacentend ofthe center lug, substantially as and for the purpose hereinaftershown. Y

It consists, finally, in a hinge for watchcases in which each outsidelug contains a pivotal pin that is adjustable endwise for the purpose ofengagement with the center lug, and is locked in position by means of asetscrew which passes inward through said outside lug, substantially asand for the purpose hereinafter set forth.

(Model.)

In the annexed drawings, A represents a watch-ease center, within theinterior of which are secured two hinge-lugs, B and B, that arerelatively arranged to permit ol' the insertion between their inner endsof a third lug, C, that is attached to a cover, D. Said lug C is securedat one end to the inner side` or' said cover, inside ofthe bearing-edged ofthe same, and extends in a curve downward and outward, so as tobring its opposite outer end into position between said lugs B. Anopening, a, formed within said case-center, part-ly or wholly within thebearing-face c', that is provided for said bearing-edge d, permits ol"the inward passage of said lug C, the arrangement being such that saidhinge-'lugs are contained wholly within the ease, and are not seen whensaid case is closed.

Vithin each lug B is provided au opening, b, which coincides axiallywith a similar opening,.b, inthe opposite lug B, and contains a pivotalpin, E, that may be entirely withdrawn within said lug, or may be causedto project beyond the inner end of the same. The center lug, C, isprovided within each face with a recess or opening, c, that coincideswith the opening Z) of the contiguous lug B, and is adapted to receivethe end ot' the pin E, contained within the latter, when said pin ismoved inward and caused to project beyond the same.

To connect the cover D with the center A, the lug C is placed inposition between the lugs B, and the pivotal pins E moved inward untilin engagement with the openings or recesses c, after which each ol saidpins is secured in place by means of a set-screw, F, that passes inwardthrough its lug B and impinges upon said pin.

Vhile the arrangement of lugs as shown is preferably employed, theoutside lugs may, if desired, be secured to the cover and the center lugsecured to the case-center.

I do not herein claim, broadly, pivotal pins when arranged to movelongitudinally to cngage with the adjacent lug or lugs, the same beingcovered by another application for patent, Serial No. 141,65.

Having thus i'ully set forth the nature and merits of my invention, whatI claim isl. A hinge for watch-cases in which are employed two pivotalpins that are each caused IOO to engage with the adjacent lug by anendwise movement, and when thus engaged are locked in place by a screwor other equivalent means, substantially as and for the purpose specied.

2. A hinge for Watch-cases in which each outside lug is provided with anaxial opening that contains a pivotal pin which by an end Wise movementmay be caused to project beyond the end ol" said lug,` and to enter intoand engage with an axial opening in the adjacent end of the center lug,substantially as and for the purpose shown.

3. A hinge for Watch-cases in which each outside lug contains a pivotalpiu that is adi5 justable endwise for the purpose oi" engagement withthe center lug, and is locked in position by means of a set-screw whichpasses inward through said outside lug, substantially as and for thepurpose set l'orth.

In testimony that claim the foregoing I have llcreuuto set my hand this18th day of August, 1881-.

FREDERICK lAPl.

"il/'itncsses:

JoHN J. Enron, JULIUS SCHNERING.

